Maybe something is wrong with your existing pit presets. You could try renaming the file "Documents\My Games\SimBin\RaceRoom Racing Experience\UserData\Player1\pitpresets.xml".
@majuh, deleted pitpresets.xml and game keeps running again Must have bin corrupt. @Andi Goodwin, but with AI control in pit when pit stop is finished on Nordschleife, my car hits the wall on the right side at pit exit, Crosslé 90 was crap.